Dental articulator



Pa't'ented flov. 8, I898.

J. w. morn"; DENTAL ARTICULATOR.

(Application filed Dec. 23, 1897.)

(No Model.)

W/TNESSES:

INVENTOH ATTORNEY.

THE uoams PETERS 00., Pucrmumo WASHINGTON, D c

UNITED STATES FFIcE.

"ATENT DENTAL ARTICULATOR.

SPECIFICATION forming part of Letters Patent No. 613,772, dated November8, 1898.

Application filed December 23, 1897. Serial No. 663,235. (No model.)

T0 to whmn/it may concern:

Be it known that I, JOHN WV. MOFFITT, a citizen of the United States,residing in the city and county of Philadelphia and State ofPennsylvania, have invented certain new and useful Improvements inDental Articulators, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification.

This invention relates to dental articulators, and has for its object toprovide a simple and efficient construction whereby the adjustments ofthe plates may be readily and accurately effected to meet the varyingrequirements of service.

To this end the invention, as generally stated, embodies two platesprovided with lateral lugs or flanges, whereof those of one plateoverlap those of the other and are provided with suitably-locatedperforations which are adapted to be brought into register during theadjustments of the plates, together with pins adapted to be inserted inopposing perforations in the respective flanges in a manner to securethe parts in their positions of adjustment, all as will be hereinafterfully described and claimed.

In the drawings, Figure 1 is a perspective View of an articulatorembodying my invention. Fig. 2 is a side elevation thereof. Fig. 3 is anend view.

A B represent the upper and lower plates,

. of appropriate shape and size, provided with rearward extensions a 17,having lateral lugs or flanges a b, respectively, the lugs or flanges abeing horizontal depending members and those I) being verticalup-projecting members. Each of the plates, with its extension andflanges, is preferably struck up from a single piece of sheet metal,although, of course, .it may be cast or otherwise formed. The flanges,as I have termed them, are so arranged that those of the upper plate maybe fitted between those of the lower plate, so as to be vertically andhorizontally movable in respect to the latter. The flanges are pro videdwith rows of perforations a 6 respectively, those of each pair beingdirectly opposite to each other, so that when the upper plate isadjusted to bring predetermined per forations in its flanges intoregister with perforations in the up-projecting flanges pins,

as C, may be inserted in the flanges, so as to secure the parts in thedesired position of ad= j ustment. By this construction it will beobvious that if the upper plate be adjusted lat erally andlongitudinally and one pin be in serted in the registering perforationsof the respective flanges said plate may be swung to any desired angleand another pin then be inserted in the perforations of the verticalflanges in a manner to support the upper plate in position and permitthe requisite move ments thereof in the practical testing of thedenture; further, that the upper plate may be swung on either of thepins and the other pin (or equivalent means) be applied in a manner tosupport the parts in the angle or position required.

I I claim 1. A dental articulator comprising two plates with overlappinglugs or flanges having rows of perforations therein, in combination witha pin or pins adapted to be inserted in predetermined perforations inthe respective lugs or flanges.

2. A dental articulator comprising two plates with rearward extensionsand perforated lugs or flanges, each of said plates being struck up froma single piece of metal, in combination with a pin or pins adapted to beinserted in predetermined perforations in the respective lugs orflanges.

In testimony whereof I have hereunto af fixed my signaturein thepresence of two subscribing Witnesses.

JOHN W. MOFFITT.

"Witnesses:

J OHN R. NOLAN, ANDREW V. GROUPE.

